2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1191
* The intake air temperature is greater than -20掳C (-4掳F).
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0A01
The engine control module detects that the temperature difference between the generator control module temperature sensor parameter and the
engine coolant temperature sensor is greater than 30掳C (86掳F).
P0A02
The engine control module detects that the generator control module temperature sensor parameter is less than -60.5掳C (-76.9掳F).
P0A03
The engine control module detects that the generator control module temperature sensor parameter is greater than 162掳C (323.6掳F).
Action Taken When the DTC Sets
DTCs P0A01, P0A02 and P0A03 are Type B DTCs.
* The cooling fans will be commanded to high speed.
* The DIC will display A/C Inoperative
Conditions for Clearing the MIL/DTC
* DTCs P0A01, P0A02 and P0A03 are Type B DTCs.
* P0A01 requires that the engine control module detect that the temperature difference between the generator control module temperature
sensor parameter and the engine coolant temperature sensor is less than or equal to 16掳C (60.8掳F) at ignition ON.
Reference Information
Schematic Reference
Hybrid Cooling Schematics ()
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Drive Motor Generator Control Module Cooling System Description and Operation ()
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Engine running, observe the scan tool DMCM Coolant Temperature Signal parameter. The reading should be between -61 to +161掳C (-77.8
to +321.8掳F) depending on the current ambient temperature and the vehicle operating conditions.
2. Operate the vehicle within the Conditions for Running the DTC.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the generator control module temperature sensor.
2. Ignition OFF for 90 seconds, test for less than 5 ohm between the low reference circuit terminal A and ground.
